| BrunNet | New Brunswick |
| Brushfire Design | Ontario |
| Brushfire North | Ontario |
| Brutal Studio | Quebec |
| Brydges Design Web & Mobile | |
| BSC Solutions Group Ltd | Ontario |
| BSD Networks | Ontario |
| BSI Labs | Ontario |
| BSides Halifax | |
| Bskyline Technology Solutions Ltd | Ontario |
| BSM | Ontario |
| BSTRO | |
| BSuite365 | |
| Bsuperior System Ltd | British Columbia |
| BTmarketing, Inc. | |
| Bubblebox | British Columbia |
| BubbleUP Marketing Corporation | Alberta |
| Buchanan Technology Consultants | |
| Buckzy Payments, Inc. | Ontario |
| Budge Studios, Inc. | Quebec |
| Budget Electronics | Ontario |
| Budgethost, Inc. | Ontario |
| Budgeto | Quebec |
| Buf Technologies, Inc. | |
| Bug-Track.com | Quebec |
| BugSeq | British Columbia |
| Build Marketing | Ontario |
| Build Me App | |
| Build Studio | Alberta |
| Build The Vision, Inc. | Ontario |
| Build Ventures | Nova Scotia |
| Build Ventures | |
| Build-Your-Own-Computer.net | British Columbia |
| Builder Lynx | Ontario |
| Builder Software Tools, Inc. | Ontario |
| BuildIT Systems Corporation | |
| BuildSmartr, Inc. | |
| Builtbymike.ca IT Services | Ontario |
| Bull Moose Capital Ltd | |
| Bulldozer | Quebec |
| Bulletproof | Prince Edward Island |
| Bulletproof Infotech | Alberta |
| Bulletproof Your PC | Ontario |
| Bulloch Technologies | |
| Bullrun Capital, Inc. | |
| Bullseye Digital Marketing | |
| Bumble Bees Venture Capital, Inc. | Ontario |
| Bundu Technology Ltd | British Columbia |
| Bunji | |
| Bunji Technologies, Inc. | |